i think you're putting to much "game" value on one/two books.
HOH/HOH2 are great. the books are reasonably priced (i got them at my library first, then paid $50 for 1&2). it does give reasonable & analytical approaches to solving poker "problems".
if you're a true novice - this book would be excellent - if the novice could comprehend the concepts of playing cards against other hearts and minds. i've played for a while and tore through both books in 3 days. well worth the time - i agreed with it more than i disagreed. still was a good read.
i didn't read Sidartha expecting it to make me budha = Dan Harrington is a brilliant poker player, but i did not read hoh/hoh2 and expect to win massive amounts of money in a 2000 person online tourny @ 20+2 online every sunday. nor do i hold much faith that he "Dan" actually wrote these books. 2+2=special casino days. time.
i think HOHs reinforces the importance of #0 experience against current opposition #1 position (table/tourny), #2 betting/raising/odds, #3 player analysis, #4 its a freaking crap shoot playing sit-n-go tournies online.... #99 when people fall asleep at the wheel - get em with their disproportionate pot/implied odds bet if you were playing their cards that you cant see

!!
it does offer an "obvious" "solution" to put yourself in a position to snag pots aggressively and/or conservatively. i've paid hand over fist for this over the years = assimilation of information. "all you're base cards belong to us"
they're good books for the cost. i actually got HOH1/2 from the library first and then bought them online = +EV.
someone should write a book on online micro limit fish, bonus whoring, how to maintain an effective hand history (software tools to id leaks), stepping up $$ level (.02/.04 to 3/6) and the difference in the competition
& where to do group buys ]).... <-- thats me drooling
i'd buy that book.
i feel like i am spelling it out on crayon/blue paraoh.